122259256665 has 64 divisors (see below), whose sum is σ = 251224436736. Its totient is φ = 49347631872.

The previous prime is 122259256663. The next prime is 122259256681. The reversal of 122259256665 is 566652952221.

It is not a de Polignac number, because 122259256665 - 2¹ = 122259256663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122259256663) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1915719 + ... + 1978508.

It is an arithmetic number, because the mean of its divisors is an integer number (3925381824).

Almost surely, 2^122259256665 is an apocalyptic number.

122259256665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

122259256665 is an abundant number, since it is smaller than the sum of its proper divisors (128965180071).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122259256665 is a wasteful number, since it uses less digits than its factorization.

122259256665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3894278.

The product of its digits is 3888000, while the sum is 51.

The spelling of 122259256665 in words is "one hundred twenty-two billion, two hundred fifty-nine million, two hundred fifty-six thousand, six hundred sixty-five".